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  • Upcoming Events

    • 27 April 2024 02:00 PM Until 03:00 PM
      5  
      All Appliantology tech members are invited to join in this workshop on all things Appliantological. 
      We have a special session planned for this one. Instead of the usual Show 'n Tell on a technical topic, we're going to post tech sheets in the comments to this Calendar Event (scroll down to see what's posted so far) and ask specific questions that can only be answered by reading the tech sheet. If you at least try to answer the questions beforehand, you'll get a lot more out of it. The tech sheet and the questions are posted in the comments section below.
      Your mission, if you should choose to accept it, is to check out the questions for each one and try to answer them ahead of time. Then come to the Dojo to see how well you did! 
      Who: This workshop is only available to tech members at Appliantology.
      When: Saturday, April 27 @10:00 AM Eastern Time.
      Where: Online via Zoom
      How:
      Click here to go to the forum topic with the registration link. If you're interested, register now. Arrive a couple minutes early to make sure your connection is working. Set a reminder for yourself for this workshop so you don’t miss it.  And check out past workshops here: https://appliantology.org/announcement/33-webinar-recordings-index-page/

Coleman Furnace Manual request


jumptrout

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Coleman gas furnace model.#7956.

Need manual if available.

Furnace fires,heats up for fan relay to come on.

Fan cycles.

Unit cools quickly and fan stops.

Burner stays lit and repeats above sequence.

Fan limit switch is a 110 degree -20 degree.

Heat exchanger in good condition.

Flue not blocked.

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  • 2 weeks later...

Manual no longer needed.

I deciphered the problem.

Furnace had been operating several years with no drip leg installed on the gas supply.

The gas nozzle and orifice had become 50% restricted with a rust buildup.

Although outlet pressure read good on the manometer,the gas pressure reduced greatly at the burner causing low flame and insufficient heat.

A thorough cleaning of the nozzle and the addition of a drip leg has this furnace working like new.

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